Pavement Preservation Concepts...– Initial preventive maintenance costs 14 times less than...
Transcript of Pavement Preservation Concepts...– Initial preventive maintenance costs 14 times less than...
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Pavement Preservation Concepts
Alaska Asphalt SummitDec 11, 2003
John Duval, PEField Engineer
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
From Rough Beginnings…
Courtesy UW Library
With a lot of Hard Work …
Source: Asphalt Institute
and Investment…
Source: Asphalt Institute
…We now have a Highway System
that is a:
Well PerformingDependable
CriticalValuable
Infrastructure Asset
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
A System Worth Preserving
“With the construction of the Nation's Interstate highway system virtually
complete, State and Federal highway agencies are shifting their attention to
preserving and operating this $1 trillion investment in highways and bridges.”
--FHWA FOCUS Newsletter
May 2000
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Outline
• Background• Pavement Preservation in a Nutshell
– “Right Treatment on the Right Pavement at the Right Time”
• Benefits and Challenges in Implementing a Pavement Preservation Program
• New Directions
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Preventive Maintenance
• Planned Strategy• Using Cost-Effective
Treatments• Contributes to long-
term performance– Preserve System– Retard Deterioration– Maintain or Improve
Functional Condition
• Example: Chip Seal
Source: AASHTO Standing Committee on Highways
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Corrective Actions
• Reactive• Localized• Often serve as a
Stop-Gap Solution• Does not contribute to
long-term performance
• Examples: Patching, Pothole Repair
Source: National Highway Institute
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Rehabilitation
• Improves or restores functional performance and/or structural capacity of the pavement
• Extends the service life of a pavement
• Examples: HMA Overlay
Source: NHI
Pavement Preservationis the sum of all
activities undertaken to provide and maintain
serviceable roadways; this includes corrective
maintenance and preventive
maintenance, as well as minor rehabilitation
projects
--National Highway Institute
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
PavementPavementConditionCondition(Functional (Functional
ororStructural)Structural)
Time (Years)Time (Years)
Good Good
Poor Poor
Typical Pavement Performance Curve
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Time (Years)
PavementCondition
Good
Poor
Timing
Critical Condition
Preventive Maint.
Source: US Army Corps of Engrs
Corrective Actions, Rehabilitation
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Time (Years)
PavementCondition
Good
Poor
$1 here ...
or $4-10 here?
Cost Effects of Timing
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
FunctionalPavementCondition(e.g. RideQuality)
Time (Years)
Good
Poor
Anticipated PM Benefits
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
FunctionalPavementCondition(e.g. RideQuality)
Time (Years)
Good
Poor
Anticipated PM Benefits
Improvement inImprovement inperformanceperformance
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Applying the right treatment
. . . To the right pavement
. . . At the right time
Philosophy of Pavement Preservation
Source: Foundation for Pavement Preservation
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Benefits of a Pavement Preservation Program
• Higher customer satisfaction• Better informed decisions• Improved strategies and techniques• Improved pavement condition• Costs savings• Increased safety
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Customer Satisfaction
NQI Survey of Users
• Moderate level of satisfaction with highway system
• Considerable opportunity to improve customer satisfaction
• Prefer permanent over temporary repairs– “Get in, Stay in, Get out, Stay out.”
• Complete construction in a timely fashion
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Customer Satisfaction
Washington State Survey• Roadway surface maintenance is the
highest priority maintenance activity• Public is willing to pay more:
– to achieve desired levels of maintenance– to reduce future costs
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Customer Satisfaction
Arizona Survey• #1 priority: safety (85 %)• #2 priority: preservation (74 %)• Over 60 % would be willing to pay more
taxes to improve maintenance service levels
• 90 % would be willing to spend more now to save money in the long term
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Customer Satisfaction
California Survey• Ranking of public priorities
– Maintenance response to accidents/disasters– Safety– Pavement conditions– Traffic flow
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Better Informed Decisions
• Program relies on proper treatment selection and treatment timing
• Need information to make decisions• Successful programs have been
integrated with Pavement Management Systems (PMS)
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Better Informed Decisions
0
10
20
30
40
50
Failed Poor Fair Good Excellent
Condition Rating (PCI)
Perc
ent
of N
etwo
rk
Current
Year 5
Source: NHI
P2 Encourages Use of PMS Data to Support Decisions
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Improved Strategies and Techniques
• One size cannot fit all• Agencies benefit
when they have multiple rehabilitation options
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Improved Pavement Condition
• Preventive maintenance helps to preserve a pavement and extend its performance
• Overall condition of network improves– Fair, Poor, and Failed Pavements are
reconstructed and returned to a high pavement condition
– Excellent and Good Pavements are kept in high condition
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Improved Pavement Condition
01020304050607080
% Poor % Fair % Good % Excellent
% o
f Pa
vemen
t Net
work
1994 Base 1999 Worst First 1999 Preventive
Source: NHI
The Intent of P2 is to Increase Overall Pavement Condition
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Cost Savings
• Most persuasive argument for shifting to preventive maintenance strategies
• Forms of cost savings– Less expensive treatments– Longer pavement life– Reduction of user delay costs
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Cost Savings
• Michigan– Initial preventive maintenance costs 14 times
less than rehabilitation or reconstruction– $700 million savings from 1992 to 1996– Overall LCCA appears to be 6:1
• California– 4:1 to 6:1 overall cost benefit with preventive
maintenance treatments
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Increased Safety
• Safety is the #1 priority of users• Explicit benefits
– Improved surface friction– Fewer defects
• Implicit benefits– Better pavement condition – Fewer and less disruptive repairs
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Increased Safety
• Importance of Work Zone Safety• Work Zone Opportunities
– Shorten the zone– Consider future needs– Improve communication– Improve markings– Encourage innovation
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Additional Benefits
• Agencies have a stable budget• Agencies have stable workforce• Contractors have stable workforce• Not affected by upswings and downswings
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Past Funding Practice
• In the past, eligibility for Federal funding required that the pavement be improved structurally
• Highway bills in the 1990s changed the way preventive maintenance is funded
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
ISTEA
• First highway bill to allow Federal funds for preventive maintenance activities
• Restrictions– Demonstrate that treatments are a cost-
effective means of extending pavement life– Projects must address safety deficiencies
Has not become a widespread practice
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
TEA-21
• Barriers were removed– Greater flexibility to address
safety concerns– More funding with fewer strings
attached
The Federal Government Encourages Pavement Preservation
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Transportation Reauthorization
• Reauthorization expected in 2004• Current Proposals
– SAFETEA slightly increases level of funding over TEA-21
• $255B over 6 years
– TEA-LU significantly increases funding by 72 percent over the TEA-21 levels
• $375B over 6 years
• Both Proposals Recognize the Importance of Preserving the Highway Infrastructure
Source: Missouri DOT and US House of Representatives
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Challenges to Implementation
• Agencies that have implemented a preventive maintenance program report extremely positive results.
• Why isn’t everyone doing it?• Barriers, both real and perceived...
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Public Perceptions
• Public averse to steering maintenance dollars toward pavements in good condition
• Agencies more likely to receive complaints about specific defects than overall network
• Need to educate the public about new philosophy
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Management Perceptions
• Need commitment from management to succeed
• Maintenance not traditionally given a high priority
• Need to create awareness of benefits• Personnel changes disrupt continuity
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Summary
• Anticipated benefits– Higher customer satisfaction– Better informed decisions– Improved strategies and techniques– Improved pavement condition– Cost savings– Increased safety– Stability
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Summary (cont’d)
• Challenges are widespread– Public perception– Management perception
Source: NHI
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
New Directions forPavement Preservation
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Foundation for Pavement Preservation
• Established in 1992• Industry Partnership
– President—Bill Ballou
• Mission“FP2 supports research to educate government and industry professionals in the economical, safety and performance advantages of pavement preservation. ”
• The Asphalt Institute is a Supporter of the Foundation
Source: FP2 website: www.fp2.org
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
National Center for Pavement Preservation
• Established in November 2003• Hosted at Michigan State University
– Director—Larry Galehouse
• Mission“lead collaborative efforts among government, industry and academia in the advancement of pavement preservation”
Source: MSU Today website: www.msutoday.msu.edu
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Findings of FHWA Scanning Tour
• France, South Africa, and Australia– Recognized leaders in Pavement
Preservation
• Key Findings:– Successful preservation begins by building
initially high structural capacity pavements– Only high quality materials used:
• 100% crushed aggregate• Polymer Modified Asphalt Binders
Source: FHWA, 2002
ASPHALT INSTITUTE
WWW.ASPHALTINSTITUTE.ORG
Thank You!